Stave-machine



4 Sheets-Sheet 1.

(No Model.)

N `BURR STAVE MAGHINE.

Patented Aug. 14, 1894.

(No Model.) 4 sheets-'sheen '2,-

N. BURR. S'TAVE MACHINE.

NO- 524,308. Patelltd-ug. 14,

IIIHIIIIIH (No Model.) y 4 Sheets-Sheet 3.

N. BURR. STAVE MACHINE.

Pate ted Aug'. 14, 1894'.

E nomas PE1-:Rs co.. moro-uma, wAsnlNnroN, n. c.

:laag 0 m (No Model.) 4 Sheets-Sheet 4.

N. BURR.

STAVE MACHINE.

` liso. 524,308. n Patented Aug. 14, 1894.

I I II mm 7%/ D W M E ma, 1/

z Noam: PETERS co. pHoro-uwe.. wAsHmaTon. n. c.v

` `UNITED STATES; PATENT OFFICE.

To all whom it may concern..- Bc it known thatI, NELSON BURR, a citizen Aof the United States, residing at Batavia, in

NELsoiv EURE, VoE EATAVIA, ILLINOIS.`

sTAvE-MAcHmE.

SPECIFICATION forming part of Letters ,Patent No. 524,308, dated August 14, 1894.

Appiicaioii fiieiocaber 8.1892. serai No. 443,206. ce man.) Y

the county of Kane and State of Illinois, have invented certain new and useful Improvements 1n Stave-Machines; and I do declare the following to be a full, clear, and exact descripsov tion of the invention, such as will enable thers skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters -of reference marked thereon, which forma part of thisspecitication.

My invention relates to machines for cutting tank staves, and consists of thevarious parts and arrangement of parts as hereinat'- ter set forth, comprising a machine adapted' to complete in one operation the cutting of a stave with both the proper bevel to its edges, and taper of form.

In the accompanying drawings, Figure 1 represents a side elevation of lthe machine. Fig. 2 is aplan view of the same'. Fig. 3 is a vertical cross section on the line 3, 3, of Fig. 2. Fig. 4 is a vertical longitudinal section on the line 4, 4, of Fig. .Fig 5 is a detail of one of the frames for carrying the saws. Fig. 6 is a detail of the saw adjusting device. Fig. 7 is a plan sectionon the line 7, 7, of Fig. 3. Fig. 8 is a longitudinal section on the line 8-8 of Fig. 2. Fig. 9 is a vertical cross section on the line 9,9, of Fig. 8. Fig. 10 is a vertical crossV lsection on the line 10, 10, of Fig.'2. 1 Fig.11 is a side elevation of the carriage.- Fig. 12 shows side and end elevations of the product of the machine; and Fig. 13 is an end view of the clamping device for securing the board in the machine.

I use a pair of circular saws K, K', mounted upon arbors journaled in moving frames which swing transversely to the plane of the saws, and' from a common center below the y machine, the` saws being so mounted upon the frames Vthat they lie upon radii of a circle Whose center is the pivotal point of the frames, and upon whose circumference the board to be cut lies when adjusted to thecarriage B.

This imaginary circle is identical in diameter with the tank in'which the stave is to be used, so thatthe angle of Vthe saws is exactly such asto cut the required bevel upon'both edges. of the stave for use in the tank in view.A The i carriage B, upon` which the board is fixed s higher at its rearward than at its forward end, so that as thestave advances it is elevated with relation to the saws and consequently gradually widened. The variation in `the height of the carriage is such as to proever .made and may be formed of two strips of wood or iron b, b', placed one above the other, one of them being in tapering form so that the rearward end of the carriage is considerably higher than its forward end, or a series of blocks may be substituted for the lower strip. y

The carriage is .held to its seat by guide lugs b2, fixed to its sides and engaged under the flange of the beam A. Dust guards B, B', are fastened to the sides of the carriage and depend below the top of the beamiange. The top of the carriage is provided with a longitudinal, internally enlarged' channel T.y The board Z, to be operated upon is placed longitudinally upon `the top of the carriage B, and is secured in' its place by means of the twoy cam-clamps S, adapted to engage its ends and which are pivoted to the sliding blocks s, which are provided with ten'ons'confornii 4A chain D, has its ends` fastened to the ends of the carriage B, and is carried over vertical `sprocket sheaves C, C', which are journaled in brackets c, c', projecting-from the ends of the beam A, and under the sprocket wheel E, to which power is 'applied as hereinafter described. The chain is held Yinengagement with this wheel E, by means'ofthe idle sprocket wheels e, e, over which it passes. The wheels E, e, e, are mounteduponA shafts which are journaled in brackets L', bolted to l p the lower flange of the beam A. The shaft F, of the wheel E, is extended some distance beyond the side of the machine and its outer end is journaled in a standard a2. Two pulleysjf, are mounted loosely upon the shaft F, and are driven in opposite directions by belts from the line shaft. A clutch G, is mounted upon the shaft F, and adapted to reciprocate between the hubs of the pulleys f, f', and to firmly engage eitherV when in contact with it. The shaft F, is formed with a longitudinal groove f 2, along the path upon which the clutch G, is adapted to slide, and the clutch is provided with an inwardly projecting .feather g, adapted to engageA said groove, so that when the clutch is in contact with either of the pulleys, the shaft F, is ro-y tated.

The clutch G, is shifted by means of .a bellg crank lever J, one arm of which is forked so; as to stradd-le the clutch, its fork being pro-y vided with inwardly projecting studs adapted j to yengage an annular groove in the clutch. l. Thelever J, is pivoted to the cross arm Z, which extends from the standard a2, to the beam A. The free end of the bell-crank le ver J, projects under and beyond the beam A, and is engaged by a forked swinging levergy l I, pivoted to the side of the beam A, at i.

A shifting bar h, is located upon the side of the beam A, directly below the path oi' the carri-age B, and is hung upon studs h', h2, iixed in the side of the 'beam and projecting through longitudinal slots in the bar h. This 1f bar is providedwith a pair vof movable stop 'pins h3, h4, which project loutwardly so as to; be engaged by the downwardly projecting finger H fixed to the carriage B. Contact of the linger H, wi-th either of the'pinsh, hhj moves the bar h, upon the studs h', h2.

The upper end of the swinging lever I, is pivotally -attached to the bar h, so that the j longitudinal movement of the latter vibrates 1 the lever, thereby moving the free arm of the bell-crank leverJ, and shifting thecluteh Gr.

It is obvious that connection between the l shifting bar h, Vand the clutch G, may be'` secured by various arrangements of the levers I, J, without-departing from the scope of the: invention the essential feature being such co-operation between these parts that contact of the nger H, with either of the stop pins h3, h4, shifts the clutch from vonepulley to the l other. f

By the mechanism described the carriage,v B, is given a reciprocating movement, and the f distance of its travel is regulated by the adl justment of the pins h,7z4,-the bar h, being t provided with any desired number of holes into which they may beset. The movement of the carriage may thus be regulated to correspond with the length of staves being eut.

The circular saws K, K', are located upon `opposite sides of the beam A, so that the carriage B, moves between them. The arbors of the saws are journaled in boxes upon 'the upper ends of the arms of U -shaped frames M, M'. These frames are carried by rigid The saws K, K', are so mounted upon the frames M, M', as to be in alignment with the series of holes in the supporting bars'of their respective frames, so that -in whateverposition the pivot pin n, may be placed, each of `the saws is upon a radius of a circle of which this pin is the center.

The lower ends of the bars m, m', move between two .guide anges fn', (only one of which is shown) so as to prevent lateral movement. The frames M, M', are adjusted so as to adapt the machine 'to use upon staves of a certain width, and held in that position by mean-s of the fclamping lframes P, P', lwhich are located Ytransversely yto the machine,.and are bolted to kthe floor. One roft-he'iframes is also braced to the nearest standard a, as shown at p. These `clamping frames are secured together by boltsQ, as -manyin number as may be desired, upon vthe screw threaded ends of which are mounted 'the lever-or wheelnuts q. The heightl lof 'the clamping frames P, P', is lsuch that the lower portion of the U of each of the frames M, l ',`1ies`=b.e tween them, and is engaged `fby the contact plates R, R,four in number, one u-pon each side of each of t-'h-e frames M, M'.

The contact plates R, R, are supported upon the innerends of set screws'r, r' ,located in Vthe clamping framessockets being pro- IOO vided in the plates for the insertion of the ends of these screws. rlhe principaipfunction of the contact plates R', R, is the :adjustment of the saws K, K', inrproper alignment. The relative adjust-ment of the .two saws is controlled by `a rod O, extending across the 'machine, and being journaled in brackets o', projecting upwardly from fthe clamping frame P. The rod O-,is provided with -rightand left screw threads toengage theaperturedblocks m2, ma, which are 'secured respectively tozthe yframes M, M', by bolts passing through the vertical slots I111.4,in'said frames. The nodiO,

i is provided at one of its ends withsacrankarm 0. Power isapplied/to the saws bymeaus of pulleys k2, 7c3, .keyed to the arbors k, 7c', be tween the .armsof the frames M, M'. Dust shields, Y, Y, are located immediately above the frames M, M'. These shields :also serve the purpose of supporting the strips :cut-from the edges ofthe stave until lthey.areaengaged by upwardly projecting vfingers f,`immedi ately beyond the saws and thereby deiiected away from the saws as they are elevated by the forward movement of "the carriage, and

thrown upon the lbelts W,'W`, which run upon j .the pulleys w, w', at each side of the beam,

andcarried to a suitable dumping place.

I show at u, u, standards bolted to the floor and provided with`journal boxes for carrying the shaft-V, upon which are mounted a pair of pulleys one of `which is keyed and the other loose, which pulleys are driven by the belt u', which transmits power from the line shaft. Belts o, u, are carried by pulleys keyed upon the shaft V, and drive the pulleys k2, k3.

The belts W, W, are also .driven by power transmitted from the shaft V, by the belt 102, and pulley w. p

Guard rails W', W are located outside of the carrying belts W, W.

In order to leave the edges of the stave smooth and ready for use without further dressing, it is necessary to avoid contact with the rearward edges of the saws. This result is secured by such a relative arrangement of the table or carriage-way and of the supports for the saws that Vthe direction of the movement of the board is oblique to lines from the centers of the saws to the pivotal points of theirframes,theboard beingcarried away from the center upon which these frames swing as it advances beyond the cutting edges of the saws. I prefer to accomplish this by inclining the carriage-wayupwardly. The standards a., a, a, are therefore, not of uniform height, so that Vthe forward end of the table or bed is lower than its rearward end, and the carriage is elevated as it advances. By this means the stave passes the rearward edges of the saws at such an elevation that the distance between them is greater than its width.

I claiml 1. In a stave machine the combination with a table or bed whose upper surface inclines upwardly from front to rear, of a carriage adapted to reciprocate upon the table, and a pair of circular saws located upon opposite sides of the table and mounted obliquely so as to liare apart upwardly, substantially as described and for the purpose set forth.

2. In a stave machine the combination with a table or bed whose upper surface inclines upwardly from front to rear, of a carriage adapted to reciprocate upon the table, a pair of circular saws located upon opposite sides of the table and mounted obliquely so as to Hare upwardly, and upwardly projecting ngers atthe rear of the saws for detlecting the strips cut from the sides of the stave, substantially as described. I

3. In a stave machine the combination with a table or bed and with a carriage tapering upwardly toward its'rearward end and adapted to reciprocate upon the table, of apair of circular saws located' upon opposite sides of the table, laterally swinging frames for carrying the `saws, and a pair of clamping frames transverse to the table and upon opposite sides of the saw frames and means for drawing said clamping frames tightly against the saw frames whereby the latter are firmly locked, substantially as described.

4. In a stave machine the combination with a table or bed and' with a carriage tapering upwardly toward its rearward end and adapted to reciprocate upon the table, of'a pair of cirtable, laterally swing frames for carrying the saws,clamping frames for locking the saw frames, contact or adjusting plates interposed between the clamping frames and the saw frames and adjustable with reference to the former, whereby the alignment of the saws with reference to the carriage movement can be adjusted, and set screws a", r' for controlling the adjusting plates, substantially as described, and for the purpose set forth.

i 5. In a stave machine the combination with a table or carriage way, of a pair of circular saws located upon opposite sides of the table and in divergent planes, the lines of the table top and of the intersection ot" the planes of the saws diverging, substantially as described and for the purpose specified.

y In testimony whereof I affix my signature in presence of two witnesses. i C y f NELSON BURR. Witnesses:

L. K. GILLsoN, MAY H. L. WING.

' cular saws located upon opposite sides of the 

